![]() I don't understand is to why dropping emergency spillway elevation produce results since pond is sized to store all the volume for 1 and 2 year storm and very little is discharged but by dropping elevation produce more discharge which ultimately produce a result. Once I drop the emergency spillway elevation (let's say to 829.00) it will produces values. When I route tihs hydrograph through the pond, all values such as peak flow, peak time and Hydrgraph volume comes zero. Pond storage is set by contours and the contour area is 98,483 SF. My pond bottom elevation is set at 828.40 and emergency spillway elevation at 829.85. ![]() The pond outflow is setup for an emergency spillway only which acts as independent structure (not multi-stage). The outflow from the pond runs into a channel and which eventually combines with the outflows from other hydrograps downstream. In my model I have a hydrograph (SCS method) routed through a pond. ![]() If you are certain that the levels are at the correct elevation, and they arent matching up with the pads elevations - then the toposurface needs to. And then add points of that height, where there are actually that height on the surface. I just started using Hydraflow hydrograph and ran into a problem while setting up pond routing. Use the 'Add Point' tool and type the actual Elevation height into the value box on the Options Bar.
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